Improvement in door-latches



O. H. GILBERT.

DOOR-LATCH.

Patented May 30,18 76.

FIG-3 H Ddom INVENTOR- UNITED STATES PATENT OFFIo.

oRvELLAs H. GILBERT, OF CHICAGO, ILLINOIS.

IMPROVEMENITVIN DOOR-LATCHES.

Specification forming part of Letters Patent No. 177,933, dated May 30,1876; application filed April 1, 1876.

.To all '[vlwm tt may concern:

Be it known that I, ORVELLAS HENRY GILBERT, of Chicago, in the county ofCook, and State of Illinois, have invented a new and useful Improvementin Door-Latch Bolts and Locks; and I do herebydeclare the fol: lowing tobe a full, clear, and exact description thereof, which will enableothers skilled in the art to which my invention relates to make and usethe same, reference being had to the accompanying drawing forming partof this specification, in which- Figure l is inside view of lock. Fig. 2is a perspective view of rose, escutcheon, knob, and lever Fig. 3,cross-section.

In the accompanying drawing, A represents my improved lock; A, thelatch-bolt,provided with the slot or mortise B. dis a spiral spring, oneend bearing against the lug d attached to the case ofthe lock, and theopposite end bear- .ingagainst thelug b, projecting from the latchbolt.B is a key-bolt provided with a slot upon its lower end to allow it towork vertically on the pin b. O is a tumbler, one end pivoted to thekey-bolt, and the opposite end provided with a mortise, 0, upon eachside of which are projections, c. U is a rose provided with the slot at,through which passes the lever D. D is the shank, and 1) the knob.

It will be observed that the rose, the shank, and the key escutcheon areall cast in one piece. The lever is then placed in position in themortise, and the pin or screw d passed through the lips on each side ofthe mortise, and through the lever, to hold it in position. Aiter thelock is placed in position in the door the ends of the levers D areplaced in the mortise B inthe end of the bolt A, and the roseis thensecured to the door, the screws entering. the doorabove and below thelock,

which operation secures the key-hole escutcheon and the knob at the sametime.

It will also be observed that the knob is secured to the outer end ofthe shank, the Washer 12 forming the shoulder against which it rests. Inopening the door the knob does not turn as'in ordinary looks. The hand,coming in contact with the lever D, presses the same toward the shank.The opposite end strikes the end of the mortise B, and 'moves the boltin that direction enough to cause it to be disengaged from the casingand allow the door to open. When the hand is released the spring athrows the bolt back to its original position. 7

A look constructed in this manner obviates the liability of the knobsbecoming loose, and

the wear of the spindle in ordinary locks, which plate 0, cast in onepiece, and proi ided with j mortise B, in combination with projectinglips and lever D passing-through a mortise, B, in the latch-bolt A] and?pivoted to said roseplate, substantiall a and for the purposesspecified. r

The above specificatici signed by me this 9th day of March,'l876.

ORVELLAS H. GILBERT.

Witnesses:

T. Z. INGERSOLL, R. D. INeERsoLL.

